Automatic CDR Estimation for Early Glaucoma Diagnosis

Figure 5

Cup region segmentation is a challenging task due to its wide range of appearances: (a) bright yellow, well-defined border and small size, (b) no perceptible colour change, (c) pale yellow, well-defined border and medium size, and (d) pale yellow, diffuse border and large size.

(a)

(b)

(c)

(d)